I am currently reading my way through a long list of science fiction and fantasy titles. (http://www.npr.org/2011/08/07/138938145/science-fiction-and-fantasy-finalists if you are interested in the list).
I read this book to fill the ‘Monsters’ square of my 2017 Halloween Book Bingo card.
I’ve read a few accounts of Antarctic exploration and At the Mountains of Madness starts out in exactly the same style, but then it veers dramatically off course--the tale becomes an H. Rider Haggard adventure novel crossed with a cheesy horror movie! Lovecraft is very skillful at making the readers use their imaginations—he doesn’t describe the horrors experienced by the men of the expedition. Instead, he shows us a destroyed campsite and lets the expedition leader tippy-toe around the ancient ruins, jumping at every sound. There is a lot of hinting and alluding to mysterious writings, rather than descriptions of actual creatures, which would have become silly quite quickly. Much better to let each reader’s mind fill in the details that they would find the most horrifying.
It has taken me a long time to get around to reading Lovecraft, probably because I’m not much of a horror reader. If you are going to read any significant amount in this genre, a basic knowledge of Lovecraft and his Cthulhu mythos will stand you in good stead. I now realize that I have been missing allusions to his work in a number of short story collections that I’ve read in the past.